Severe lower respiratory tract infection in infants and toddlers from a non-aflluent population: viral etiology and co-detection as risk factors - Silva, Emerson Rodrigues da; Pitrez, Paulo Márcio Condessa; Arruda, Eurico; Matiello, Rita; Sarria, Edgar E.; Paula, Flavia Escremim de; Proença-Modena, José Luis; Delcaro, Luana Sella; Cintra, Otávio; Jones, Marcus H.; Ribeiro, José Dirceu; Stein, Renato T. (BMC Infectious Diseases, 2013)